Drill-socket.



Nmmfm.4 Paten-ted Mar. 26,1901.

n.-c0x. umu. soKE'r. r plicatim med mbv. 2a, 1900) (No Model.)

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ATTEST, INVENTQH' wmf ,wf-K h B Y 7/1ZMTTY UNITED STATES PATENT OEEICE.

JACOB D. COX, OF CLEVELAND, OHIO.

DRILL-SOCKET.

SPECIFICATION forming* part Of Letters Patent N 0. 670,470, dated March 26, 1901.

Application filed November 23, 1900. Serial No. 37,503. (No model.)

.have invented certain new and useful Improvementsin Drill-Sockets; and I do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to drill-sockets and machine-spindles of the kind having what are known as drift-slots, through which to enter a drift or wedge for releasing the tool or socket.

The object of the invention is to improve the shape of the drift-slot, so as to prevent the drift from battering down the corners of the tangs of drills and other'tools, as has hitherto occurred, and thus spoiling the fit of the shanks or tangs in the sockets.

Hitherto in all drift-slots known to me the walls of the slot, top and bottom, have been straight across and parallel their entire length, and the said slot-s have intersected the seats or recesses for holding, the tang of the tool or drill so that the tang would extend or project a short distance into said slots, as it also does by my construction. The end of the tang also was and is straight across, but considerably reduced in length as compared with the length of the slot-say one-third as long or thereabout. The tang, furthermore, projected centrally into the slot, so that as the wedge-shaped drift was inserted it struck the nearest corner of the drift, and thereby had its opposite edge thrown up into straight engagement with the roof of the slot. This occurred unavoidably because the said contact-corner of the tang was about a third of the way in from the beginning of the slot,

and hence operated to throw the drift at bothA sides up to the top of the slot. It followed that the taper of the drift was thus thrown wholly to its under side, and therefore could not touch the end of the tang except at the corner on which it originally engaged. The inevitable effect of this was to batter down the corners of the tang out of shape and frequently to render its removal and replacement difficult.

My invention is therefore designed to overcome and remedy this apparent defect in socket and machine-spindle construction, and this is accomplished by changing the shape of the drift-slot, all substantially as shown and described, and particularly pointed out in the claims.

Referring to the drawings, .Figure l is a Vertical central sectional elevation of a drill or tool socket and a tang of a tool or drill and a portion of adrift in operative relation therein, and Fig. 2 is a sectional elevation of the same parts at right angles to Fig. l.

In the drawings thus shown, A represents the drill 'or tool socket, B the drill or tool, and C the drift.

The invention centers in the drift-slot, which has the peculiarity of construction shown in Fig. l. Here it will be seen that the said slot does not have parallel top and bottom walls, as heretofore, but the top wall is formed with a central bearing-point 2 and upwardly and outwardly bearing edges 3, running from this point to the outside surface. The space between point 2 and the lower straight edge or wall 4 of said slot is the same substantially as the space between the upper and lower walls or edges of the old-fashioned drift-slot, so that the drift C is inserted about as far now as it formerly wasY for starting the release of the tool or'drill; but then the drift was inevitably thrown into line with the top of the slot opposite the tang 6, as already pointed out,wl1ich brought the incline of the wedge onto one corner of the tang. Now this is reversed as tothe relation and operation of the drift, because the central projection 2 takes the place of the corner of the tang as the pivot-point of the drift, and being axially at the center of the socket it brings the pivot centrally over tang 6. Hence the drift is thrown down on both sides of the said pivotpoint and must bear flat on the straight edge 7 on the end of the tang from end to end. Thus not only the relation of the drift to the tool is wholly changed, but it now bears evenly on the entire end of the tang and takes its bearing from a point in alinement with the axis of the drill or tool which is to be expelled. Obviously this is a very material and advan tageous difference, and there is now no possible danger of injury to the tool or drill in any way. The same result could be obtained IOO by Cutting away only one side of the driftslot instead of both, as here shown, at inolin ed edges 3; but this would necessitate putting in the drift always and only at one side, which would work mueh inconvenience and loss of time to the operator.

What I Claim isl. A socket or spindle for holding drills and 0111er tools in which the working edge or roof of the drift-Slot has its outer portions eut away and its central portion left standing so that the Working edge of the drift bears on substantially the central portion of said slot. substantially as described.

2. A socket or spindle having a drift-slot transversely thereof and a downward projection Centrally in the roof of said slot, thereby forming an engaging point for the drift eentrally over the tool,substantially as described. The combination of a socket or spindle having a drift-slot with an engaging point for the drift at its center and top and the sides of said top flaringontwardly and upwardly from said engaging point, a tool in said socket and a drift engaging said point and the tang of the tool, substantially as described.

\Vitness my hand to the foregoing specilieation this 14th day of November, 1900.

JACOB D. COX. Witnesses:

M. A. Snam-IAN, R. B. MOSER. 

